Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 112 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.26 × 125 =
2. 2.12 × 75 =
3. 3.30 × 25 =
4. 4.18 × 35 =
5. 5.15 × 30 =
6. 6.125 × 26 =
7. 7.15 × 40 =
8. 8.75 × 18 =
9. 9.38 × 75 =
10. 10.22 × 35 =
11. 11.14 × 75 =
12. 12.26 × 25 =
13. 13.15 × 8 =
14. 14.65 × 14 =
15. 15.34 × 35 =
16. 16.30 × 65 =
17. 17.8 × 15 =
18. 18.32 × 125 =
19. 19.30 × 125 =
20. 20.45 × 40 =
21. 21.10 × 55 =
22. 22.12 × 45 =
23. 23.45 × 24 =
24. 24.34 × 45 =
25. 25.18 × 45 =
26. 26.14 × 75 =
27. 27.65 × 36 =
28. 28.25 × 10 =
29. 29.14 × 75 =
30. 30.14 × 45 =
31. 31.125 × 10 =
32. 32.28 × 55 =
33. 33.26 × 35 =
34. 34.65 × 16 =
35. 35.14 × 25 =
36. 36.25 × 14 =
37. 37.35 × 26 =
38. 38.55 × 36 =
39. 39.36 × 45 =
40. 40.22 × 75 =

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